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 A114013 Least multiple of prime(n) ending in digit 9. 1
 49, 99, 39, 119, 19, 69, 29, 279, 259, 369, 129, 329, 159, 59, 549, 469, 639, 219, 79, 249, 89, 679, 909, 309, 749, 109, 339, 889, 1179, 959, 139, 149, 1359, 1099, 489, 1169, 519, 179, 1629, 1719, 579, 1379, 199, 1899, 669, 1589, 229, 699, 239, 2169, 2259 (list; graph; refs; listen; history; text; internal format)
 OFFSET 4,1 COMMENTS Subsidiary sequences: (1) least multiple of prime(n) ending in 2 or 3 or ..., or 8; (2) divide the above sequences by prime(n). LINKS Table of n, a(n) for n=4..54. MATHEMATICA f[n_] := Block[{k = 1, p = Prime[n]}, While[Mod[k*p, 10] != 9, k++ ]; k*p]; Table[ f[n], {n, 4, 54}] (* Robert G. Wilson v, Nov 17 2005 *) PROG (PARI) a(n) = my(p=prime(n), k=1); while(((k*p) % 10) != 9, k++); k*p; \\ Michel Marcus, Jan 29 2023 CROSSREFS Cf. A114011, A114012. Sequence in context: A044519 A031484 A260009 * A235578 A161689 A354342 Adjacent sequences: A114010 A114011 A114012 * A114014 A114015 A114016 KEYWORD base,nonn AUTHOR Amarnath Murthy, Nov 12 2005 EXTENSIONS More terms from Robert G. Wilson v, Nov 17 2005 STATUS approved

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Last modified August 11 05:00 EDT 2024. Contains 375059 sequences. (Running on oeis4.)